Abstract: The real time 3D visualization is the key issue in the mechanical products design.In this paper the MEMPHIS middleware framework is presented for the integration of CAD geometries and assemblies with derived Virtual Reality（VR） models and its high visualization.The goal of this work is to connect real time VR applications，especially for the managing CAD models.At the same time，while materials can be switched directly on the VR model，the modification of part geometries must be made on the CAD model.The system will make a synchronized change.So that avoiding artificially joining the virtual reality special information that portrays the VR model visible characteristic information attribute such as illumination establishment，the material quality，the texture，behavior and so on just as the traditional transformation from the CAD model to the VR model when.Thus greatly enhances the mechanical product coordination design efficiency and visualization performance.